In this section
@article{Wang:2025:1367-2630/adb778,
author = {Wang, Y and Rodewald, J and Lopez, O and Manceau, M and Darquié, B and Sauer, BE and Tarbutt, MR},
doi = {1367-2630/adb778},
journal = {New Journal of Physics},
title = {Wavelength modulation laser spectroscopy of N<inf>2</inf>O at 17 µm},
url = {http://dx.doi.org/10.1088/1367-2630/adb778},
volume = {27},
year = {2025}
}
TY - JOUR
AB - Using a mid-infrared quantum cascade laser and wavelength modulation absorption spectroscopy, we measure the frequencies of ro-vibrational transitions of N2O in the 17 µm region with uncertainties below 5 MHz. These lines, corresponding to the bending mode of the molecule, can be used for calibration of spectrometers in this spectral region. We present a model for the lineshapes of absorption features in wavelength modulation spectroscopy that takes into account Doppler broadening, collisional broadening, saturation of the absorption, and lineshape distortion due to frequency and intensity modulation. Combining our data with previous measurements, we provide a set of spectroscopic parameters for several vibrational states of N2O. The lines measured here fall in the same spectral region as a mid-infrared frequency reference that we are currently developing using trapped, ultracold molecules. With such a frequency reference, the spectroscopic methods demonstrated here have the potential to improve frequency calibration in this part of the spectrum.
AU - Wang,Y
AU - Rodewald,J
AU - Lopez,O
AU - Manceau,M
AU - Darquié,B
AU - Sauer,BE
AU - Tarbutt,MR
DO - 1367-2630/adb778
PY - 2025///
TI - Wavelength modulation laser spectroscopy of N<inf>2</inf>O at 17 µm
T2 - New Journal of Physics
UR - http://dx.doi.org/10.1088/1367-2630/adb778
VL - 27
ER -